[dpdk-dev] [PATCH 1/5] net/virtio: split virtio-net and virtio status

[Adrian Moreno <amorenoz@redhat.com>]

Currently, the same field is being used to store both the generic virtio
device status and the virtio-net-specific status.

This can become problematic since they have different sets of status
bits that may collide (e.g: VIRTIO_CONFIG_STATUS_ACK and
VIRTIO_NET_S_LINK_UP).

Split them in different fields.

Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
---
 drivers/net/virtio/virtio_user/virtio_user_dev.h |  5 ++++-
 drivers/net/virtio/virtio_user_ethdev.c          | 11 ++++++-----
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.h b/drivers/net/virtio/virtio_user/virtio_user_dev.h
index 56e638f8a..10b274d19 100644
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
@@ -43,7 +43,10 @@ struct virtio_user_dev {
 	uint64_t	protocol_features; /* negotiated protocol features
 					    * (Vhost-user only)
 					    */
-	uint8_t		status;
+
+	uint8_t		virtio_net_status; /* virtio-net device status */
+	uint8_t		status;		   /* virtio device status */
+
 	uint16_t	port_id;
 	uint8_t		mac_addr[RTE_ETHER_ADDR_LEN];
 	char		path[PATH_MAX];
diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c
index e51425c4f..5b06d8e89 100644
--- a/drivers/net/virtio/virtio_user_ethdev.c
+++ b/drivers/net/virtio/virtio_user_ethdev.c
@@ -205,7 +205,8 @@ virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
 			}
 			r = recv(dev->vhostfd, buf, 128, MSG_PEEK);
 			if (r == 0 || (r < 0 && errno != EAGAIN)) {
-				dev->status &= (~VIRTIO_NET_S_LINK_UP);
+				dev->virtio_net_status &=
+					(~VIRTIO_NET_S_LINK_UP);
 				PMD_DRV_LOG(ERR, "virtio-user port %u is down",
 					    hw->port_id);
 
@@ -217,7 +218,7 @@ virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
 						  virtio_user_delayed_handler,
 						  (void *)hw);
 			} else {
-				dev->status |= VIRTIO_NET_S_LINK_UP;
+				dev->virtio_net_status |= VIRTIO_NET_S_LINK_UP;
 			}
 			if (fcntl(dev->vhostfd, F_SETFL,
 					flags & ~O_NONBLOCK) == -1) {
@@ -225,12 +226,12 @@ virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
 				return;
 			}
 		} else if (dev->is_server) {
-			dev->status &= (~VIRTIO_NET_S_LINK_UP);
+			dev->virtio_net_status &= (~VIRTIO_NET_S_LINK_UP);
 			if (virtio_user_server_reconnect(dev) >= 0)
-				dev->status |= VIRTIO_NET_S_LINK_UP;
+				dev->virtio_net_status |= VIRTIO_NET_S_LINK_UP;
 		}
 
-		*(uint16_t *)dst = dev->status;
+		*(uint16_t *)dst = dev->virtio_net_status;
 	}
 
 	if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs))
-- 
2.26.2